Umair Irfan
Former correspondent
Latest articles by Umair Irfan
The youngest children may prove to be the hardest to vaccinate.
West Virginia v. EPA is part of a bigger legal crusade to destroy environmental protections.
Covid-19 vaccines for little kids are critical even though they face lower risks.
In the age of electric vehicles, higher gas mileage is more important than ever.
The omicron variant of Covid-19 has branched out into more transmissible and evasive versions.
How do we cool people without heating up the planet?
What makes South Asia’s recent severe temperatures so surprising.
Where companies and governments should place bets for the clean energy technologies of the future.
The virus itself killed millions, but pandemic disruptions led to nearly three times as many deaths.
The Arctic was once an oasis of international cooperation. Russia’s invasion brought it to a halt.